Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 776 492
2) Placement test : grammar for beginners (anonyme) 5 988 546
3) A/AN (webmaster) 5 363 200
4) Auxiliary BE (webmaster) 3 223 275
5) Present continuous (webmaster) 2 998 061
6) Present simple (webmaster) 2 910 668
7) Present simple (webmaster) 2 596 307
8) Present continuous (webmaster) 2 432 114
9) Adjectives (webmaster) 2 092 969
10) A/an (anonyme) 2 014 281
11) Present perfect simple (webmaster) 1 641 096
12) Preterite (webmaster) 1 625 236
13) Vocabulary - Placement test (bridg) 1 618 719
14) Preterite (webmaster) 1 445 642
15) Short placement test (webmaster) 1 443 152
16) To be (bridg) 1 405 672
17) What time is it? (webmaster) 1 348 662
18) Present perfect (webmaster) 1 344 382
19) The alphabet in English (webmaster) 1 320 493
20) Adjectives (anonyme) 1 215 356
21) What time is it? (webmaster) 1 207 238
22) Numbers (webmaster) 1 188 269
23) 'A' ou 'An' (anonyme) 1 174 704
24) Two presents: present continuous, present simple (webmaster) 1 148 644
25) To be (bridg) 1 145 063
26) Comparatives / Superlatives (webmaster) 1 102 106
27) Numbers (webmaster) 1 070 293
28) CAN / MUST (webmaster) 1 058 121
29) THE/ A / AN / nothing (webmaster) 1 032 600
30) Comparatives (webmaster) 1 006 796
31) Family life (bridg) 1 000 333
32) Numbers > 100 (webmaster) 986 045
33) Future (going to/will/present continuous) (anonyme) 963 079
34) Plural (webmaster) 955 350
35) Superlatives (webmaster) 874 743
36) Adjectives (anonyme) 874 407
37) Simple present (bridg) 853 372
38) Spelled words N°1 (bridg) 849 776
39) Placement test beginners: Check your spelling (anonyme) 829 872
40) Introducing oneself (webmaster) 826 944
41) Adverbs of frequency (anonyme) 816 688
42) Family (bridg) 784 373
43) General test-End of high school / Beginning of university (webmaster) 782 424
44) Present simple (anonyme) 779 459
45) Frequency adverbs (webmaster) 777 471
46) Present BE + Ving (bridg) 764 616
47) Genitive (webmaster) 723 290
48) Family tree (anonyme) 719 092
49) Passive form (anonyme) 718 845
50) Preterite: simple or continuous? (webmaster) 716 061
51) Placement test (beginners) (lili73) 700 623
52) Past simple or present perfect (anonyme) 693 080
53) Future (webmaster) 675 626
54) 2 Preterites (webmaster) 661 513
55) Present perfect simple (bridg) 659 632
56) Preterite (webmaster) 619 766
57) List of 200 irregular verbs and audio (bridg) 615 659
58) Modals (webmaster) 612 444
59) Spelled words N°2 (bridg) 608 879
60) Height (webmaster) 606 131
61) Modals (webmaster) 604 625
62) Articles a / an / the (anonyme) 596 742
63) Plural forms (bridg) 577 089
64) Nationalities (webmaster) 573 999
65) Past continuous / Past simple (anonyme) 565 291
66) Irregular plurals (bridg) 553 292
67) Two presents: simple and continuous (webmaster) 549 287
68) Preterite (bridg) 548 639
69) Superlatives (frapedur) 537 489
70) Vocabulary: greeting people (here4u) 536 443
71) Give your opinion (bridg) 531 661
72) Adverbs of Frequency (bridg) 516 743
73) Present simple or continuous (anonyme) 509 920
74) Present perfect / preterite ? (anonyme) 508 459
75) Possessive case (anonyme) 480 322
76) Countries & nationalities (bridg) 473 143
77) 'The' or nothing? (webmaster) 471 065
78) Introducing oneself (easy) (webmaster) 470 557
79) Past tenses (bridg) 470 396
80) Passive voice (webmaster) 462 660
81) Present Simple vs. Past Simple (anonyme) 456 233
82) Questions : how to ask them (anonyme) 448 006
83) General Test II / End of high school / Beginning of universi (webmaster) 445 960
84) IN, ON, AT or TO? (webmaster) 444 783
85) Relative pronouns (webmaster) 443 984
86) Comparative of superiority (anonyme) 438 038
87) How to pronounce the final -ED? (past simple) (webmaster) 437 128
88) Relative clauses (webmaster) 423 015
89) Sounds: [h] (webmaster) 419 359
90) Comparative (anonyme) 413 050
91) A/an/Ø (bridg) 398 438
92) Future simple (anonyme) 395 945
93) Past simple (anonyme) 395 898
94) This / That / These / Those (webmaster) 392 327
95) Conditional (webmaster) 391 370
96) Passive voice (anonyme) 390 109
97) Comparing (webmaster) 387 849
98) Can / could/ may/ might (woodyrun) 379 112
99) Present perfect or past tense (anonyme) 376 700
100) Much, many, little and few (felin) 372 232
101) Personal pronouns (anonyme) 371 226
102) Preterite continuous (BE + -ING) (webmaster) 368 596
103) Some, any, no, enough, too/too much/too many (webmaster) 367 964
104) Genitive case (bridg) 367 724
105) Confusing words - Placement test (bridg) 364 454
106) Irregular verbs (webmaster) 363 336
107) Numbers from 1 to 10 (anonyme) 361 382
108) Past perfect simple, past perfect continuous (anonyme) 360 787
109) Present continuous or present simple (webmaster) 359 413
110) Present perfect or preterite? (anonyme) 356 251
111) Simple Past : regular verbs (anonyme) 352 413
112) Comparative Adjectives (bridg) 352 038
113) Who, Whom, Which, or Whose? (anonyme) 348 538
114) Past simple (video) (anonyme) 348 055
115) Past simple or past continuous (anonyme) 341 619
116) While / When (anonyme) 338 103
117) What time is it? (webmaster) 337 533
118) Modals (tinou) 336 338
119) Modal: may/might (anonyme) 334 014
120) Cardinal and ordinal numbers (anonyme) 328 553
121) The superlative (anonyme) 324 633
122) Possessive adjectives and pronouns (woodyrun) 323 968
123) How to talk about the weather (lili73) 320 863
124) Since and for (anonyme) 318 471
125) Flags (webmaster) 317 394
126) Irregular verbs (bridg) 315 802
127) Prepositions - in, on, at (anonyme) 313 986
128) Pronouns (woodyrun) 313 188
129) Tenses (anonyme) 311 647
130) Placement test 3 (webmaster) 310 265
131) Order of adjectives (webmaster) 306 425
132) Could/Couldn't (laure95) 305 670
133) Comparative (anonyme) 304 320
134) Adjectives and prepositions (anonyme) 303 930
135) Agreement Tags (webmaster) 303 895
136) Asking questions (webmaster) 302 946
137) Present perfect OR simple past? (bridg) 298 194
138) Questions in the past tense (anonyme) 297 325
139) Superlative Adjectives (bridg) 295 603
140) Uncountable nouns (webmaster) 295 454
141) Object pronouns (bridg) 294 535
142) Placement test 1 (anonyme) 292 564
143) Present simple (anonyme) 290 751
144) Passive form (anonyme) 290 091
145) Prefer/rather (bridg) 289 150
146) Can/Must/Should (laure95) 288 853
147) Past perfect (lili73) 287 305
148) Must or Have to? (woodyrun) 286 973
149) The/an/nothing (bridg) 284 994
150) To be (anonyme) 283 383
151) Can and can't (laure95) 280 542
152) Vocabulary: asking and answering (here4u) 280 430
153) Modal verbs (bridg) 277 132
154) Some / Any / no... (bridg) 270 245
155) Days of the week (bridg) 269 059
156) So / neither (anonyme) 264 242
157) Past simple (video) (anonyme) 263 553
158) Used to (bridg) 260 292
159) Present continuous (chnawa) 259 422
160) Should / must (anonyme) 259 382
161) Past tense (anonyme) 259 155
162) Vocabulary: on the phone (here4u) 258 711
163) Find out a quantity (webmaster) 258 483
164) Superlative + and adjective (anonyme) 257 034
165) Articles : a / an / the / Ø (anonyme) 256 078
166) Comparative and superlative (anonyme) 254 594
167) Numbers 1/100 (anonyme) 253 468
168) Modal can (video) (anonyme) 252 735
169) Relatives pronouns (who, which, that...) (anonyme) 247 814
170) Comparatives (anonyme) 246 628
171) Vocabulary: at the restaurant (here4u) 245 638
172) A few, a little, few, little (anonyme) 245 038
173) Would rather / would prefer to (anonyme) 244 162
174) Present continuous and the Going to form (anonyme) 242 376
175) Have something done (anonyme) 239 681
176) Should/ have to/ must (anonyme) 239 667
177) The past (webmaster) 237 718
178) Future continuous and future perfect. (felin) 237 449
179) Used to/would (woodyrun) 237 336
180) How to ask a question in English (bridg) 235 139
181) I wish, if only (felin) 233 951
182) Pluperfect (webmaster) 233 718
183) Countable or Uncountable? (webmaster) 233 018
184) Some / any (younes91) 232 283
185) Should / shouldn't (anonyme) 231 238
186) Present simple or continuous (bridg) 230 768
187) Adjectives - ing and ed (felin) 228 698
188) Hypothesis (webmaster) 227 962
189) Auxiliary BE (anonyme) 226 303
190) Articles a/an/the/0 (bridg) 226 131
191) Article The or nothing (anonyme) 225 797
192) Present perfect with Ever - never - (anonyme) 225 367
193) Present continuous OR Present simple? (bridg) 225 263
194) Must or mustn't (laure95) 225 047
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 684
196) To / in order to / so as to / so that (irish21) 219 769
197) Present perfect (bridg) 219 350
198) Comparison (komiks) 217 636
199) What time is it ? (anonyme) 217 564
200) Indirect speech (bridg) 216 214
