Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 774 881
2) Placement test : grammar for beginners (lucile83) 5 986 008
3) A/AN (webmaster) 5 361 510
4) Auxiliary BE (webmaster) 3 222 479
5) Present continuous (webmaster) 2 996 889
6) Present simple (webmaster) 2 907 109
7) Present simple (webmaster) 2 595 256
8) Present continuous (webmaster) 2 429 637
9) Adjectives (webmaster) 2 092 463
10) A/an (anonyme) 2 013 284
11) Present perfect simple (webmaster) 1 639 153
12) Preterite (webmaster) 1 622 080
13) Vocabulary - Placement test (bridg) 1 618 295
14) Preterite (webmaster) 1 443 897
15) Short placement test (webmaster) 1 442 670
16) To be (bridg) 1 405 075
17) What time is it? (webmaster) 1 348 073
18) Present perfect (webmaster) 1 342 778
19) The alphabet in English (webmaster) 1 320 015
20) Adjectives (lucile83) 1 214 820
21) What time is it? (webmaster) 1 206 095
22) Numbers (webmaster) 1 187 975
23) 'A' ou 'An' (anonyme) 1 173 925
24) Two presents: present continuous, present simple (webmaster) 1 148 009
25) To be (bridg) 1 144 644
26) Comparatives / Superlatives (webmaster) 1 100 213
27) Numbers (webmaster) 1 069 698
28) CAN / MUST (webmaster) 1 057 792
29) THE/ A / AN / nothing (webmaster) 1 031 679
30) Comparatives (webmaster) 1 006 456
31) Family life (bridg) 999 843
32) Numbers > 100 (webmaster) 985 753
33) Future (going to/will/present continuous) (anonyme) 962 143
34) Plural (webmaster) 954 985
35) Superlatives (webmaster) 874 191
36) Adjectives (anonyme) 874 002
37) Simple present (bridg) 852 917
38) Spelled words N°1 (bridg) 849 405
39) Placement test beginners: Check your spelling (lucile83) 829 706
40) Introducing oneself (webmaster) 826 694
41) Adverbs of frequency (lucile83) 815 909
42) Family (bridg) 783 954
43) General test-End of high school / Beginning of university (webmaster) 782 092
44) Present simple (lucile83) 778 670
45) Frequency adverbs (webmaster) 777 155
46) Present BE + Ving (bridg) 764 074
47) Genitive (webmaster) 722 985
48) Family tree (anonyme) 718 791
49) Passive form (lucile83) 716 103
50) Preterite: simple or continuous? (webmaster) 715 468
51) Placement test (beginners) (lili73) 700 218
52) Past simple or present perfect (lucile83) 692 273
53) Future (webmaster) 675 395
54) 2 Preterites (webmaster) 661 019
55) Present perfect simple (bridg) 658 544
56) Preterite (webmaster) 619 154
57) List of 200 irregular verbs and audio (bridg) 615 278
58) Modals (webmaster) 612 219
59) Spelled words N°2 (bridg) 608 616
60) Height (webmaster) 605 931
61) Modals (webmaster) 603 931
62) Articles a / an / the (lucile83) 596 732
63) Plural forms (bridg) 576 767
64) Nationalities (webmaster) 573 759
65) Past continuous / Past simple (anonyme) 564 026
66) Irregular plurals (bridg) 552 983
67) Two presents: simple and continuous (webmaster) 549 041
68) Preterite (bridg) 548 280
69) Vocabulary: greeting people (here4u) 536 426
70) Superlatives (frapedur) 536 196
71) Give your opinion (bridg) 531 387
72) Adverbs of Frequency (bridg) 516 505
73) Present simple or continuous (lucile83) 509 090
74) Present perfect / preterite ? (anonyme) 507 411
75) Possessive case (anonyme) 480 093
76) Countries & nationalities (bridg) 472 859
77) 'The' or nothing? (webmaster) 470 866
78) Introducing oneself (easy) (webmaster) 470 376
79) Past tenses (bridg) 470 032
80) Passive voice (webmaster) 462 061
81) Present Simple vs. Past Simple (anonyme) 455 555
82) Questions : how to ask them (lucile83) 447 707
83) General Test II / End of high school / Beginning of universi (webmaster) 445 736
84) IN, ON, AT or TO? (webmaster) 444 488
85) Relative pronouns (webmaster) 443 584
86) Comparative of superiority (lucile83) 437 169
87) How to pronounce the final -ED? (past simple) (webmaster) 436 436
88) Relative clauses (webmaster) 422 728
89) Sounds: [h] (webmaster) 419 190
90) Comparative (anonyme) 412 504
91) A/an/Ø (bridg) 397 990
92) Future simple (lucile83) 395 431
93) Past simple (anonyme) 394 741
94) This / That / These / Those (webmaster) 392 158
95) Conditional (webmaster) 391 109
96) Passive voice (anonyme) 389 807
97) Comparing (webmaster) 387 702
98) Can / could/ may/ might (woodyrun) 378 903
99) Present perfect or past tense (anonyme) 376 291
100) Much, many, little and few (felin) 371 658
101) Personal pronouns (anonyme) 371 114
102) Preterite continuous (BE + -ING) (webmaster) 368 093
103) Some, any, no, enough, too/too much/too many (webmaster) 367 828
104) Genitive case (bridg) 367 407
105) Confusing words - Placement test (bridg) 364 369
106) Irregular verbs (webmaster) 363 056
107) Numbers from 1 to 10 (lucile83) 361 209
108) Past perfect simple, past perfect continuous (anonyme) 360 675
109) Present continuous or present simple (webmaster) 359 283
110) Present perfect or preterite? (anonyme) 355 700
111) Simple Past : regular verbs (anonyme) 352 082
112) Comparative Adjectives (bridg) 351 899
113) Who, Whom, Which, or Whose? (anonyme) 348 270
114) Past simple (video) (lucile83) 347 455
115) Past simple or past continuous (lucile83) 340 731
116) While / When (anonyme) 337 678
117) What time is it? (webmaster) 337 345
118) Modals (tinou) 336 195
119) Modal: may/might (lucile83) 333 863
120) Cardinal and ordinal numbers (anonyme) 328 388
121) Possessive adjectives and pronouns (woodyrun) 323 747
122) The superlative (anonyme) 323 719
123) How to talk about the weather (lili73) 320 847
124) Since and for (lucile83) 318 186
125) Flags (webmaster) 317 226
126) Irregular verbs (bridg) 315 582
127) Prepositions - in, on, at (anonyme) 313 843
128) Pronouns (woodyrun) 312 638
129) Tenses (anonyme) 311 293
130) Placement test 3 (webmaster) 310 103
131) Order of adjectives (webmaster) 306 275
132) Could/Couldn't (laure95) 305 558
133) Comparative (anonyme) 304 084
134) Adjectives and prepositions (lucile83) 303 847
135) Agreement Tags (webmaster) 303 762
136) Asking questions (webmaster) 302 808
137) Present perfect OR simple past? (bridg) 298 065
138) Questions in the past tense (lucile83) 297 112
139) Superlative Adjectives (bridg) 295 369
140) Uncountable nouns (webmaster) 295 239
141) Object pronouns (bridg) 294 120
142) Placement test 1 (lucile83) 292 397
143) Present simple (lucile83) 290 373
144) Passive form (anonyme) 289 223
145) Prefer/rather (bridg) 288 974
146) Can/Must/Should (laure95) 288 593
147) Must or Have to? (woodyrun) 286 669
148) Past perfect (lili73) 286 475
149) The/an/nothing (bridg) 284 802
150) To be (anonyme) 283 273
151) Vocabulary: asking and answering (here4u) 280 416
152) Can and can't (laure95) 279 874
153) Modal verbs (bridg) 277 021
154) Some / Any / no... (bridg) 270 041
155) Days of the week (bridg) 269 022
156) So / neither (anonyme) 264 143
157) Past simple (video) (lucile83) 263 422
158) Used to (bridg) 260 192
159) Should / must (anonyme) 259 102
160) Past tense (anonyme) 259 006
161) Vocabulary: on the phone (here4u) 258 683
162) Present continuous (chnawa) 258 675
163) Find out a quantity (webmaster) 258 407
164) Superlative + and adjective (lucile83) 256 828
165) Articles : a / an / the / Ø (anonyme) 255 489
166) Comparative and superlative (anonyme) 254 113
167) Numbers 1/100 (anonyme) 253 245
168) Modal can (video) (lucile83) 252 632
169) Relatives pronouns (who, which, that...) (anonyme) 247 787
170) Vocabulary: at the restaurant (here4u) 245 628
171) Comparatives (anonyme) 245 459
172) A few, a little, few, little (anonyme) 244 828
173) Would rather / would prefer to (anonyme) 244 061
174) Present continuous and the Going to form (anonyme) 242 269
175) Have something done (anonyme) 239 571
176) Should/ have to/ must (anonyme) 239 209
177) The past (webmaster) 237 676
178) Future continuous and future perfect. (felin) 237 364
179) Used to/would (woodyrun) 237 024
180) How to ask a question in English (bridg) 234 930
181) I wish, if only (felin) 233 890
182) Pluperfect (webmaster) 233 631
183) Countable or Uncountable? (webmaster) 232 871
184) Some / any (younes91) 231 773
185) Should / shouldn't (anonyme) 231 075
186) Present simple or continuous (bridg) 230 765
187) Adjectives - ing and ed (felin) 228 605
188) Hypothesis (webmaster) 227 808
189) Auxiliary BE (lucile83) 226 207
190) Articles a/an/the/0 (bridg) 226 013
191) Article The or nothing (anonyme) 225 682
192) Present perfect with Ever - never - (anonyme) 225 272
193) Present continuous OR Present simple? (bridg) 225 158
194) Must or mustn't (laure95) 224 498
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 631
196) To / in order to / so as to / so that (irish21) 219 556
197) Present perfect (bridg) 219 218
198) What time is it ? (anonyme) 217 403
199) Comparison (komiks) 217 022
200) Indirect speech (bridg) 215 916
