Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 768 077
2) Placement test : grammar for beginners (lucile83) 5 974 788
3) A/AN (webmaster) 5 353 514
4) Auxiliary BE (webmaster) 3 218 614
5) Present continuous (webmaster) 2 991 546
6) Present simple (webmaster) 2 888 568
7) Present simple (webmaster) 2 590 074
8) Present continuous (webmaster) 2 419 589
9) Adjectives (webmaster) 2 090 181
10) A/an (anonyme) 2 008 871
11) Present perfect simple (webmaster) 1 631 846
12) Vocabulary - Placement test (bridg) 1 616 271
13) Preterite (webmaster) 1 609 859
14) Short placement test (webmaster) 1 440 993
15) Preterite (webmaster) 1 436 348
16) To be (bridg) 1 402 093
17) What time is it? (webmaster) 1 345 428
18) Present perfect (webmaster) 1 336 073
19) The alphabet in English (webmaster) 1 317 851
20) Adjectives (lucile83) 1 212 310
21) What time is it? (webmaster) 1 202 080
22) Numbers (webmaster) 1 186 533
23) 'A' ou 'An' (anonyme) 1 170 315
24) Two presents: present continuous, present simple (webmaster) 1 144 234
25) To be (bridg) 1 142 670
26) Comparatives / Superlatives (webmaster) 1 091 905
27) Numbers (webmaster) 1 067 372
28) CAN / MUST (webmaster) 1 056 316
29) THE/ A / AN / nothing (webmaster) 1 026 858
30) Comparatives (webmaster) 1 004 938
31) Family life (bridg) 997 881
32) Numbers > 100 (webmaster) 984 308
33) Future (going to/will/present continuous) (anonyme) 959 189
34) Plural (webmaster) 953 183
35) Superlatives (webmaster) 872 581
36) Adjectives (anonyme) 872 186
37) Simple present (bridg) 850 819
38) Spelled words N°1 (bridg) 847 572
39) Placement test beginners: Check your spelling (lucile83) 828 901
40) Introducing oneself (webmaster) 825 686
41) Adverbs of frequency (lucile83) 812 917
42) Family (bridg) 782 436
43) General test-End of high school / Beginning of university (webmaster) 780 079
44) Frequency adverbs (webmaster) 775 873
45) Present simple (lucile83) 774 410
46) Present BE + Ving (bridg) 761 992
47) Genitive (webmaster) 721 626
48) Family tree (anonyme) 717 362
49) Preterite: simple or continuous? (webmaster) 713 343
50) Passive form (lucile83) 705 796
51) Placement test (beginners) (lili73) 698 460
52) Past simple or present perfect (lucile83) 688 258
53) Future (webmaster) 674 366
54) 2 Preterites (webmaster) 658 922
55) Present perfect simple (bridg) 654 256
56) Preterite (webmaster) 616 119
57) List of 200 irregular verbs and audio (bridg) 613 519
58) Modals (webmaster) 611 269
59) Spelled words N°2 (bridg) 607 301
60) Height (webmaster) 605 076
61) Modals (webmaster) 600 415
62) Articles a / an / the (lucile83) 596 679
63) Plural forms (bridg) 575 195
64) Nationalities (webmaster) 572 732
65) Past continuous / Past simple (anonyme) 557 822
66) Irregular plurals (bridg) 551 752
67) Two presents: simple and continuous (webmaster) 547 508
68) Preterite (bridg) 546 888
69) Vocabulary: greeting people (here4u) 536 316
70) Superlatives (frapedur) 531 824
71) Give your opinion (bridg) 530 208
72) Adverbs of Frequency (bridg) 515 648
73) Present simple or continuous (lucile83) 503 482
74) Present perfect / preterite ? (anonyme) 503 218
75) Possessive case (anonyme) 479 007
76) Countries & nationalities (bridg) 471 230
77) 'The' or nothing? (webmaster) 470 022
78) Introducing oneself (easy) (webmaster) 469 713
79) Past tenses (bridg) 468 107
80) Passive voice (webmaster) 460 247
81) Present Simple vs. Past Simple (anonyme) 451 260
82) Questions : how to ask them (lucile83) 446 186
83) General Test II / End of high school / Beginning of universi (webmaster) 444 942
84) IN, ON, AT or TO? (webmaster) 443 270
85) Relative pronouns (webmaster) 442 073
86) Comparative of superiority (lucile83) 434 855
87) How to pronounce the final -ED? (past simple) (webmaster) 434 324
88) Relative clauses (webmaster) 421 763
89) Sounds: [h] (webmaster) 418 546
90) Comparative (anonyme) 410 665
91) A/an/Ø (bridg) 396 051
92) Future simple (lucile83) 394 008
93) This / That / These / Those (webmaster) 391 303
94) Conditional (webmaster) 389 846
95) Past simple (anonyme) 389 020
96) Passive voice (anonyme) 388 479
97) Comparing (webmaster) 387 136
98) Can / could/ may/ might (woodyrun) 377 757
99) Present perfect or past tense (anonyme) 374 320
100) Personal pronouns (anonyme) 370 574
101) Much, many, little and few (felin) 369 109
102) Some, any, no, enough, too/too much/too many (webmaster) 367 209
103) Preterite continuous (BE + -ING) (webmaster) 366 138
104) Genitive case (bridg) 366 086
105) Confusing words - Placement test (bridg) 363 967
106) Irregular verbs (webmaster) 362 234
107) Numbers from 1 to 10 (lucile83) 360 567
108) Past perfect simple, past perfect continuous (anonyme) 360 200
109) Present continuous or present simple (webmaster) 358 744
110) Present perfect or preterite? (anonyme) 352 868
111) Comparative Adjectives (bridg) 351 135
112) Simple Past : regular verbs (anonyme) 350 764
113) Who, Whom, Which, or Whose? (anonyme) 347 112
114) Past simple (video) (lucile83) 345 898
115) Past simple or past continuous (lucile83) 337 503
116) What time is it? (webmaster) 336 581
117) Modals (tinou) 335 518
118) While / When (anonyme) 334 459
119) Modal: may/might (lucile83) 333 204
120) Cardinal and ordinal numbers (anonyme) 327 632
121) Possessive adjectives and pronouns (woodyrun) 322 594
122) The superlative (anonyme) 321 087
123) How to talk about the weather (lili73) 320 753
124) Since and for (lucile83) 317 365
125) Flags (webmaster) 316 608
126) Irregular verbs (bridg) 314 822
127) Prepositions - in, on, at (anonyme) 313 413
128) Pronouns (woodyrun) 309 982
129) Tenses (anonyme) 309 821
130) Placement test 3 (webmaster) 309 664
131) Order of adjectives (webmaster) 305 270
132) Could/Couldn't (laure95) 304 731
133) Adjectives and prepositions (lucile83) 303 530
134) Comparative (anonyme) 303 341
135) Agreement Tags (webmaster) 303 165
136) Asking questions (webmaster) 301 958
137) Present perfect OR simple past? (bridg) 297 561
138) Questions in the past tense (lucile83) 296 393
139) Superlative Adjectives (bridg) 294 608
140) Uncountable nouns (webmaster) 294 402
141) Object pronouns (bridg) 292 592
142) Placement test 1 (lucile83) 291 573
143) Present simple (lucile83) 288 726
144) Prefer/rather (bridg) 288 206
145) Can/Must/Should (laure95) 287 456
146) Passive form (anonyme) 285 919
147) Must or Have to? (woodyrun) 285 452
148) The/an/nothing (bridg) 283 818
149) Past perfect (lili73) 283 296
150) To be (anonyme) 282 625
151) Vocabulary: asking and answering (here4u) 280 341
152) Can and can't (laure95) 277 791
153) Modal verbs (bridg) 276 559
154) Some / Any / no... (bridg) 269 174
155) Days of the week (bridg) 268 766
156) So / neither (anonyme) 263 512
157) Past simple (video) (lucile83) 262 923
158) Used to (bridg) 259 893
159) Vocabulary: on the phone (here4u) 258 603
160) Past tense (anonyme) 258 493
161) Should / must (anonyme) 258 374
162) Find out a quantity (webmaster) 258 210
163) Superlative + and adjective (lucile83) 256 031
164) Present continuous (chnawa) 254 475
165) Numbers 1/100 (anonyme) 252 413
166) Modal can (video) (lucile83) 252 265
167) Comparative and superlative (anonyme) 251 823
168) Articles : a / an / the / Ø (anonyme) 251 821
169) Relatives pronouns (who, which, that...) (anonyme) 247 703
170) Vocabulary: at the restaurant (here4u) 245 517
171) A few, a little, few, little (anonyme) 243 695
172) Would rather / would prefer to (anonyme) 243 534
173) Present continuous and the Going to form (anonyme) 241 773
174) Comparatives (anonyme) 239 883
175) Have something done (anonyme) 239 109
176) Should/ have to/ must (anonyme) 237 792
177) The past (webmaster) 237 377
178) Future continuous and future perfect. (felin) 236 952
179) Used to/would (woodyrun) 235 848
180) How to ask a question in English (bridg) 233 617
181) I wish, if only (felin) 233 449
182) Pluperfect (webmaster) 233 034
183) Countable or Uncountable? (webmaster) 232 356
184) Present simple or continuous (bridg) 230 707
185) Should / shouldn't (anonyme) 230 367
186) Some / any (younes91) 229 976
187) Adjectives - ing and ed (felin) 228 066
188) Hypothesis (webmaster) 227 202
189) Auxiliary BE (lucile83) 225 734
190) Articles a/an/the/0 (bridg) 225 666
191) Article The or nothing (anonyme) 225 216
192) Present continuous OR Present simple? (bridg) 224 586
193) Present perfect with Ever - never - (anonyme) 224 584
194) Must or mustn't (laure95) 222 744
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 265
196) Present perfect (bridg) 218 839
197) To / in order to / so as to / so that (irish21) 218 311
198) What time is it ? (anonyme) 216 960
199) Indirect speech (bridg) 214 923
200) Comparison (komiks) 213 192
